1. How does speed change as something falls?
Falling objects
How does speed change as something falls?
Starter: What speed did this man reached when he sky dived from outer space?!
What else happened on his journey?

2. His Max Speed
Max velocity: 833.9mph

3. Freefalling objects
Watch the video and prepare to answer some questions.
Use animations to support

4. Motion of falling objects
Q: why do you see this pattern?
Speeding up
Task: describe in terms of forces why a free falling object reaches a steady speed. (4 marks)
Freefall – a falling ball gets steadily faster as it falls.
Kenneth Eward/Biografx/Science Photo Library
Steady speed
Apply Newtons 1st Law

5. Velocity-time graph for terminal velocity…
Parachute opens – diver slows down
Velocity
Speed increases…
Terminal velocity reached…
Diver hits the ground
New, lower terminal velocity reached
Time
04/12/2018

6. Can you explain this in terms of forces?
Parachute opens – air resistance increases.
Velocity
Gravity bigger than air resistance.
Air resistance equals gravity
Diver hits the ground
New, lower terminal velocity reached as air resistance and gravity balance.
Time
04/12/2018

7. Task – complete the practise questions.
Revision time.
Choose 1 topic from p4 so far and make a poster about it, then produce a set of questions where the answers are found in the poster.

8. Mini Test Time
Do not do question 4a.